I'm on cd23, and for the last 4 cycles I have ovulated between cd 21 and 25, the one before I ovulated cd 10. My periods are not very regular. Yesterday I was spotting a little bit of browny coloured blood and today I am having some extremely light bleeding which is mostly brown and some dark pink/red, not really enough to get onto my underwear and I have ovulation type pinching pain around my ovaries, do you know what this could be?